CVE-2026-89448

CriticalCVSS 9.3/10Last modified Oct 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Force requesting ACS when tboot is enabled

Currently the conditions of requesting ACS in detect_intel_iommu() don't include tboot, leading to a possible misconfiguration with ACS disabled (e.g. due to user opts) while iommu is later forced on by tboot_force_iommu().

Fix it by checking tboot in detect_intel_iommu().

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 5d990b627537e59a3a2f039ff588a4750e9c1a6a, < 3fd2b60ea9bd18348f5e971678f31041ef211047; >= 5d990b627537e59a3a2f039ff588a4750e9c1a6a, < 579eb867d3da63f3b5e32f235925e1daa7ec70d0; >= 5d990b627537e59a3a2f039ff588a4750e9c1a6a, < aaeb81241e802c86be69394f72d49fde3f861fbb; >= 5d990b627537e59a3a2f039ff588a4750e9c1a6a, < 45705a6bfdb283f7b3b509010fd617b72f942537; >= 5d990b627537e59a3a2f039ff588a4750e9c1a6a, < 87bc611c6c98a41c00feb7b06b0c297dd141a2ae; >= 5d990b627537e59a3a2f039ff588a4750e9c1a6a, < 607432b2618b61df81134be0ef2562b8300c1216
LinuxLinux2.6.33

References

Timeline

Published
Sep 11, 2026
Last modified
Oct 30, 2026
NVD status
Received

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CVE-2026-89448: Critical severity, CVSS 9.3 | Vulnix